A bag contains 40 balls , of then are red , some are yellow and the rest are black . The probability of drawing a red ball and a yellow ball are 1/4 and 2/5 respectively . <br /><br />On the basis of above information, answer the following questions :- <br />1. what is the probability of drawing a black ball at random from the bag:<br />a.7/20 b.1/4 c.3/5 d.1/2 <br />2.The number of Yellows balls in the bag is:<br />a.18 b.24 c.12 d.15<br />3.What is the probability of drawing a black ball at random of the bag is:<br />a.7/24 b.7/12 c.5/24 d.9/48<br />4.What is the probability of drawing a red ball is:<br />a.5/24 b.1/4 c.7/12 d.3/4
plz answer the questions its urgent
Answers
Answer:
the basis of above information, answer the following questions :- 1. what is the probability of drawing a black ball at random from the ...
Answer:
Probability of an event = no. of favorable outcomes / total no. of outcomes
Probability of drawing any colored ball = 1 ( sure event )
Probability of drawing a red ball = 1/4
Probability of drawing a yellow ball = 2/5
Probability of drawing a black ball = 1 - ( 1/4 + 2/5 )
= 1 - ( 5/20 + 8/20 )
= 1 - 13/20
= 20/20 - 13/20
= 7/20
Number of red balls = 1/4*40 = 10 balls
Number of yellow balls = 2/5*40 = 16 balls
Number of black balls = 7/20*40 = 14 balls
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